client program compiled with pie

Reminder: Our Daikon tool set uses Valgrind to allow us to monitor program
execution. We have been telling our clients that the must build their
programs with -no-pie. We would like to remove that restriction.  Given an
IRStmt with tag = Ist_IMark, we look at the IMark.addr. With -no-pie this
matches the pc addresses in the DWARF debug info. We would like to know how
to do the mapping in a pie executable.  Presumably, we need to add a load
address of some kind.  How do we find that?

Thank you,
Mark